"A radiation warning sign in front of the containment shelter for the damaged fourth reactor (left) and the new safe confinement structure (right) at the Chernobyl nuclear power plant, photographed on April 23rd, 2013, three days ahead of the 27th anniversary of the disaster at the plant. The confinement structure, being placed over the existing Chernobyl ""sarcophagus"", will have a span of 247 meters and weigh 29,000 tonnes when fully assembled, according to the European Bank of Reconstruction and Development. Photograph:  Photograph: Gleb Garanich/Reuters"
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